Pressure-regulator



J. McNAMARA. PRESSURE REGULATOR. APPLICATION FILED MR. 20I 1919.

A WOR/VIE)l PRESSURE-REGULATOR.

Specification of Letters Patent. I

Patentedfapi. c, ieee.,

Application filed March 20, 1919. Serial No. 283,925.

i T0 allwhom t may concern.'

' l; Fig. 4 is a section Fig. 2; Fig. 5 is a partial plan showing the4 from a pressure Be it known that I, JAMES MGNAMARA, a subject of the King of Great Britain, (who has declared his intention of becoming a citizen of the United States,) residing in the city of Portland, in the county of Multnomah and State of Oregon, have invented a new and useful Pressure-Regulator, of which the followingis a specication.

My invention relates more particularly to a means .for reducing and regulating the pressure of gas which is being delivered tank toa cutting or welding torch.

The object of my invention is to provide an exceedingly simple and efficient means for reducing and regulating gas pressures, which will be easy to manufacture, not liable to injury from rough handling, easy to repair, and absolutely accurate in regulation over a wide range of pressures.

I attain these object 'in the manner illustrated in the accompanying drawing, in which- 1 Figure 1 is an end elevation with a portion cut away in section along the line 1-1 in Fig. 2; Fig. 2 isa lbroken section through stuffing box and high pressure inlet and in front of working parts; Fig. 3 is a plan shown in section along the line 3-3 in Fig. along the line 4-4 in indicator and graduatlons.

Similar numbers and letters of reference refer to the same or similar parts throughout the several views.

The gas tank A1 and the torch A2 repre`r sent the usual appliances which are in common use in the art. i

Referring directly to l my device, the

frame F1 is the central portion of a hollow cylinder. Alongthe bottom edge of F1 isV Around the inside' the threaded flange F2. of frame F1 and near its `top is the ledge F3 which supports the glassjcover plate F4, over` which is placed the packing` F5, which is held down by the perforated guard F5 On" which` the glass F1 are the graduations F2 may vary to suit the peculiar requirements of the individual regulator. F8 is the ordi'- nary safety valve which is screwed into the side of the frame F1. 2

The tank pipe H1 delivers the gas, which is under a high and variable pressure, to the regulator and is screwed into the receptacle depressing the bracket K2,

H2. `The end of the'tank pipe `is formed 1nto the tip H2. H4 is the tapped central core of the receptacle H2. H5 is the gas space which is formed around the ycore H4'.` Inside of the core H1 is the bracket4 H6,"

whose hole H2 carries the plunger H2, whose head H0 contains the ber valve seat H10. H11 is the low pressure outlet. l

On the under side of the threaded ange F2 is placed the diaphragm K1, upon which is mounted the bracket K2 whose threaded shank K3 passes through the diaphragm and is secured thereto by the nut K4. Beneath the nut K1I is the compression spring K2' which is held in place by the threaded spring retainer K5, which screws into the cap K2 on the flange F2. K2 also serves to hold the diaphragm K1 in place and is perforated at KB to balance the pressureon both sides of the cap K2.

L1 isa stuffing box which is closed by the gland L2 whose stem is the regulator screw L3 of which the shoulder L1 is' able to exert an end thrust on the packing. L5 is a thumb formed on the lower side of the hinged slide M1 and are joined to the bracket K2 by the pin M2. On the dove-tailed portion M5 is mounted the crosshead M2 whosev arm M9 has the opening M10.

The bell crank' lever O1 has a horizontal vlimb O2 and a vertical limb O3. Its fulcrum is located at thehole Oiy and consists of the pin O5 which is carried, by theupper bosses R1 is the regulator carriage which istapped to ride on the screw L2. From the carriage R1 project theforks R2 and the indicator arm R3 which moves along o n the under side of the graduatedglass F4. I

It will be seenv that any gas escaping from the tip H5. and does not escape throughthe outlet H11 willl exert a `pressure on the diagram K1A compressing the spring K5 and which in turn draws downward the crosshead M1s through whose opening M1o passes the limb O2 of the bell crank lever O1, whose limb O3 now eXf erts a pressure against the plunger H8 and forces the valve seatHlOagainst the tip H3r` therebycutting off the flow of gas. It is evident that by operating the thumb nut L5 the carriage R1 will be moved along the screw L3, and its fork R2 will move the arm M9 along the limb O2 thereby' changing the leverage directed against the plunger H8.

It will also be seen that by `converging the longitudinal aXes of the limb O2 and the slide M4, that a'greater rapidity of adjustment is secured than would otherwise be possible.

By supporting the plunger H8 from one 1 wall of the opening H4, I avoid the bad effects of expansion and contraction and, by jacketing the point at which the high pressure gas escapes, the freezing action is practically eliminated.

While I have thus described my invention, it is not my desire to limit my invention to this precise form or method of application, but intend that it shall cover all forms and modifications that fall fairly within the appended claim.

What I claim as new and desire to protect by Letters Patent of the United States, is:

In a pressure regulator the combination of a gas chamber having a high pressure inlet valve and a regulated pressure outlet with a valve regulating mechanism, consisting of a diaphragm arranged to form the bottom of said gas chamber, a perforated cap adapted to hold` said diaphragm in place, a spring placed between said cap and diaphragm, in a. manner -to return said diaphragm to its original position when the `contained pressure is reduced, a knuckle member secured upon said diaphragm, a guide hinged inside of said chamber and joined to said knuckle, a slide. mounted on said guide having an eye at its upper end, a forked nut adapted to engage said slide, a screw adapted to move said -nut and be operated from the exterior of said chamber, a bell crank lever adapted to enter the eye of said slide and be actuated thereby and having its other arm arranged to actuate said high pressure inlet valve.

JAMES MCNAMARA. 

